How severe is CVE-2023-28656?

CVE-2023-28656 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2023-28656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28656?

CVE-2023-28656 primarily affects F5 Nginx Api Connectivity Manager. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-28656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-28656 published?

CVE-2023-28656 was published on 2023-05-03 and last updated on 2026-06-17.

CVE-2023-28656

CVE-2023-28656 is a high-severity vulnerability in F5 Nginx Api Connectivity Manager with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: F5 Nginx Api Connectivity Manager
Published: 2023-05-03
Last modified: 2026-06-17

Description

NGINX Management Suite may allow an authenticated attacker to gain access to configuration objects outside of their assigned environment. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Frequently asked questions

What is CVE-2023-28656?: NGINX Management Suite may allow an authenticated attacker to gain access to configuration objects outside of their assigned environment. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2023-28656?: CVE-2023-28656 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2023-28656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28656?: CVE-2023-28656 primarily affects F5 Nginx Api Connectivity Manager. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-28656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-28656 published?: CVE-2023-28656 was published on 2023-05-03 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_select_deploy:-:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_api_connectivity_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_security_monitoring:*:*:*:*:*:*:*:*

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